JSFiddle - React, Tailwind, and code Playground

by Mihai_T

HTML

<header>
    <div class="title">
       TITLE
    </div>
    <div class="navbar">
        <ul>
            <li style="float: left"><a href="#home">Home</a></li>
            <li><a href="#contract">Contracts</a></li>
            <li><a href="#about">About Us</a></li>
            <li><a href="#other">Other</a></li>
            <li> <a href="#release">Release Notes</a></li>
            <li> <a target="_blank" href="http://www.phpartnership.com">Pinnacle Health Partnership</a></li>
        </ul>
        <ul class="aditional" id ="contract">
                <li>test1</li>
                <li>test2</li>
                <li>test3</li>
                <li>test4</li>
               </ul>
        <ul class="aditional" id ="about">
                <li>about</li>
                <li>about</li>
                <li>about</li>
                <li>about</li>
               </ul>
    </div>
</header>

CSS

body {
    background-color: #fff;
    margin: 0;
    font-family: Arial;
    color: #333;
}

header {
    background-color: #333;
    position: fixed;
    top: 0;
    width: 100%;
}

.navbar {
    display: block;
    text-align: center;
   
}

.navbar ul {
    list-style-type: none;
    padding: 0;
    margin: 0;

}

 .navbar li {
    display: inline-block;
    vertical-align: middle;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
    box-shadow: 0 0 1px rgba(0, 0, 0, 0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    -moz-osx-font-smoothing: grayscale;
    position: relative;

}
.navbar li:before {
    content: "";
    position: absolute;
    z-index: -1;
    left: 50%;
    right: 50%;
    bottom: 0;
    background: white;
    height: 4px;
    -webkit-transition-property: left, right;
    transition-property: left, right;
    -webkit-transition-duration: 0.3s;
    transition-duration: 0.3s;
    -webkit-transition-timing-function: ease-out;
    transition-timing-function: ease-out;
}
.navbar li:hover:before, navbar li:focus:before, .navbar li:active:before {
    left: 0;
    right: 0;
}

.navbar li a {
    padding: 25px;
    display: block;
    height: 100%;
    color: white;
    text-decoration: none;
}

.title {
    height: 80px;
    padding: 2px;
    background-color: #fff;
}

.container {
    margin-top: 150px;
    padding-top: 50px;
}

.home {
    margin-top: 10px;
    text-align: center;
    padding: 40px !important;
}
.wrap {
    width: 100%;
    margin: 0 auto;
}
.left_col {
    float: left;
    width: 50%;
}
.right_col {
    float: right;
   width: 50%;
}
.right_col img {
    width: 80%;
    margin-top: 50px;
    border: 2px solid black;
    border-radius: 5px;
}
.left_col img {
    width: 80%;
    margin-top: 50px;
    border: 2px solid black;
    border-radius: 5px;
}

.aditional {
    position:absolute;
    top:100%;
    width:100%;
    background:#000;
    display:none;
}
.aditional li {
    ...

JavaScript

$('.navbar ul li a').click(function() {
$(".aditional").slideUp()
    var target = $(this).attr('href');
    $(target).slideDown();

})